Incinerator

ABSTRACT

An upright incinerator has a burner at the bottom and a removable one-piece combined grate and flue. This removable unit comprises a bundle of upright bars that define the flue. A grate of bar stock mounted adjacent the lower end of the upright bundle comprises a plurality of circular bars interconnected to the flue by outwardly extending bars. The unit rests removably on the grate.

United States Patent Miller 1 51 June 6, 1972 [54] INCKNERATOR 1,093,356 4/1914 Prescott ..110/18 l 808 234 6/193l Kohn ..l l0/l8 l t [721 H M'uer Rgers Ark 3,334,598 8/1967 Overfield ..110/18 [73] Assignee: Hoyt Corporation, Rogers, Ark.

[22] Filed: Oct 13, 1970 Primary Examiner-Kenneth W. Sprague A!t0rneyYoung & Thompson [21] App]. No.: 80,351

[57] ABSTRACT [52] US. Cl. ..ll0/18C An upright incinerator has a burner at the bottom and a [51] 1].]!- Cl. ..F23g 9/00 removable one piece combined grate and i remova [58] Freld 0f Search ..l lO/s C, C, 18 R ble unit comprises a bundle of p gh bars that define the flue. A grate of bar stock mounted adjacent the lower end of [56] References C'ted the upright bundle comprises a plurality of circular burs inter- UNITED STATES PATENTS connected to the flue by outwardly extending bars. The unit rests removably on the grate. 1,800,817 4/1931 Cowles ..l l0/l8 2,041,973 5/1936 Sherwood ..l 10/ 1 8 5 Claims, 5 Drawing Figures 35 I 49 39 if I I I 37 I 1| 1 Fll' 1' PATENTEDJUH s 1912 a A 3 v 1 -I W w i iwmx iy wfim 1111111111.

t wwm wmimw o INVENTOR.

' Conrad/7f /V///er Young Thompson ATTORNEYS INCINERATOR The present invention relates to incinerators, more particularly of the type comprising an upright casing having a burner adjacent the bottom.

It is an object of the present invention to provide such an incinerator, in which very high temperatures are generated and controlled.

Another object of the present invention is the provision of such an incinerator which may be readily disassembled for cleaning and repair and quickly and easily reassembled for use.

Finally, it is an object of the present invention to provide such an incinerator, which will be relatively simple and inexpensive to manufacture, easy to operate, maintain and repair, and rugged and durable in use.

Other objects and advantages of the present invention will become apparent from a consideration of the following description, taken in connection with the accompanying drawing, in which:

FIG. 1 is a perspective view, with parts broken away, of an incinerator according to the present invention;

FIG. 2 is a top plan view of FIG. 1 with the loading door in closed position in full line and in open position in phantom line;

FIG. 3 is a perspective view of a modified form of flue gratmg;

F IG. 4 is a perspective view of the flame baffle; and

FIG. 5 is a fragmentary perspective view of the lower end of the incinerator, showing particularly the clean-out door and the arrangement of the grate support.

Referring now to the drawing in greater detail, there is shown an incinerator comprising an upright cylindrical casing 1 adapted to rest by its lower edges on the ground or other level support. Secured to a lower inside portion of casing 1 but spaced above the bottom thereof is flat horizontal plate 3 that fonns the bottom of the incinerator. Plate 3 is provided with an upright coaxial cylindrical sleeve 5 that is secured to the upper surface there of and that surrounds an opening (not shown) through plate 3 which is of substantially the same diameter as the inside diameter of sleeve 5. Casing 1 and plate 3 and sleeve 5 are preferably of sheet metal. In this opening are disposed a burner 7 and a pilot 9 that are supplied with gas through conduits 1 1 and 13, respectively, the conduit 11 being under the control of a valve 15.

Burner 7 and pilot 9 do not by any means entirely fill the opening in plate 3 that is bordered by sleeve 5. Therefore, primary air for combustion enters through openings 17 and rises within sleeve 5. Secondary air is brought in through openings 17 through the side walls of casing 1 a substantial distance above plate 3.

Supported on'angle iron uprights 19 that are secured to and peripherally spaced about the lower inner side wall of casing 1 is a flue-grate-baffle unit 21. Unit 21 comprises a plurality of upright rods 23 in a generally cylindrical bundle that define between them an upright flue centered in casing 1. Rods 23 may be secured together by metal rings 25 as shown in the embodiment of FIG. 1, or by a metal helix 27 of bent rod stock, as in the embodiment of FIG. 3.

The lower ends of certain of the rods 23 are secured to and interconnected by a baffle 29 which is preferably of sheet metal and preferably downwardly concave, and most preferably generally conical as seen in FIGS. 1 and 4 so that ashes will not accumulate on its upper surface. The lower ends of those certain rods 23 may be welded to the upper outer marginal surface of baffle 29, so that the periphery of baffle 29 which is circular is disposed in a horizontal plane. The upper edge of sleeve 5 is circular and horizontal and baffle 29 is spaced a substantial distance above the upper edge of sleeve 5. The baffle 29 serves not only to deflect the flame, but also to deflect ashes from burner 7; and to this end, the diameter of baffle 29 is preferably slightly greater than that of sleeve 5.

A grate is provided by a plurality of outwardly and upwardly extending rods 31 which may be welded at their radially inner and lowermost ends to the lowermost ring 25 or to the lowermost convolution of the helix 27in FIGS. 1 and 3, respectively. Rods 31, in turn, are welded to and support a plurality of rings 33 of bar stock, which are all concentric with the axis of the incinerator but disposed at progressively higher levels the greater is their diameter. In other words, the grating defined by rods 31 and rings 33 is upwardly concave and annularly conical.

The unit 21 rests removably by gravity on the upper ends of uprights 19. Specifically, the outermost ring 33 can rest on the upper ends of the uprights, or the tops of the uprights 19 can be provided with upwardly opening recesses (not shown) each for the reception of the outer end of a rod 31. In this latter case, the number of rods 31 is of course equal to or an even multiple or fraction of the number of uprights 19.

The top of easing 1 is closed by a removable cover 35 that is held in place on the upper end of casing 1 by gravity and also by a downwardly depending circular flange 37 that extends entirely about cover 35. Cover 35 has a door 39 that forms a little more than half the area of the full width of the cover and that is swingably mounted about an upright axle 41 eccentric to casing 1 so that it may be swung horizontally from the closed position shown in full line in FIG. 2 to the open position shown in phantom line in FIG. 2. A handle 43 is provided for horizontally swinging the door 39, and a detent 45 provides a stop for locating door 39 in its closed position.

In addition to the door 39 being opened ans closed, the cover 35 can be bodily removed so that the entire upper end of the incinerator is open. When open, the unit 21 can be lifted out by means of handles 46 of bar stock welded to the upper ends of upright rods 23 or rings 25 or helix 27. The remaining portion of the cover 35 is pierced by a flue opening 47 surrounded by a flue stack 49. Ashes falling through the grate formed by rods 31 and rings 33 can be removed from the bottom of the incinerator by opening a clean-out door 51 removably supported on brackets 53 of the type which permits the door 51 to be grasped by its handle 55 and lifted and then pulled off.

In operation, the door 39 at the upper end of the incinerator is swung open from the full line to the phantom line position of FIG. 2, and the material to be burned is loaded into the incinerator in the annular space between the flue defined by the upright rods 23 and the inner side of casing l. The material to be burned comes to rest on the grate provided by rods 31 and rings 33. When valve 15 is turned on and the pilot 9 lights burner 7, the flame and hot gas rise and strike the baffle 29 and are directed radially outwardly and then pass up and about the outer edges of baffle 29 and are directed to the underside of the grate. The hot gases can pass up through the grate, then through the material to be incinerated and also through the central flue and out between the upright rods 23 into the material to be incinerated. A maximum area is thus provided for incineration, as well as optimum direction of the incinerating gases.

It is also to be noted that the flue opening 47 is disposed eccentrically of the incinerator, above a portion of the incinerator that will be occupied by the material to be incinerated. This further encourages passage of the incinerating gases through the material to be incinerated.

When ashes accumulate in the bottom of the incinerator, the door 51 is simply opened and they are removed.

When it is desired to take out the unit 21 for inspection or maintenance or cleaning or repair, it is necessary only to remove the cover 35 bodily and lift out the unit 21 by the handles 46.

From a consideration of the foregoing disclosure, therefore, it will be evident that all of the initially recited objects of the present invention have been achieved.

Although the present invention has been described and illustrated in connection with preferred embodiments, it is to be understood that modifications and variations may be resorted to without departing from the spirit of the invention, as those skilled in this art will readily understand. Such modifications and variations are considered to be within the purview and scope of the present invention as defined by the appended claims.

Having described my invention, I claim:

1. An incinerator comprising an upright casing having a burner adjacent its lower end, a flame baffle above the burner, a grate above the flame baffle, a central upright flue extending upwardly from the grate, the flue being open to the passage of hot gas and material therethrough, and a bundle of upright spaced metal rods defining said flue, at least some of said upright rods extending below said grate, said bafile being secured to the lower ends of said rods that extend below the grate.

2. In an incinerator comprising an upright casing having a burner adjacent its lower end, a grate above the burner and a central upright flue extending upwardly from the grate, the flue being open to the passage of hot gas and material together.

3. An incinerator as claimed in claim 2, said rings being disposed on the outer sides of said upright members.

4. An incinerator as claimed in claim 2, one of said rings interconnecting the upper ends of said upright members.

5. An incinerator as claimed in claim 2, said gate comprising a plurality of concentric metal rings, and metal members extending outwardly from adjacent the lower ends of said upright members and interconnecting said concentric rings of said grate. 

1. An incinerator comprising an upright casing having a burner adjacent its lower end, a flame baffle above the burner, a grate above the flame baffle, a central upright flue extending upwardly from the grate, the flue being open to the passage of hot gas and material therethrough, and a bundle of upright spaced metal rods defining said flue, at least some of said upright rods extending below said grate, said baffle being secured to the lower ends of said rods that extend below the grate.
 2. In an incinerator comprising an upright casing having a burner adjacent its lower end, a grate above the burner and a central upright flue extending upwardly from the grate, the flue being open to the passage of hot gas and material therethrough, said flue and grate being a one-piece assembly, and means for supporting said assembly in the incinerator above the burner; the improvement in which said flue is a bundle of upright spaced elongated members, and a plurality of vertically spaced metal rings securing said upright members together.
 3. An incinerator as claimed in claim 2, said rings being disposed on the outer sides of said upright members.
 4. An incinerator as claimed in claim 2, one of said rings interconnecting the upper ends of said upright members.
 5. An incinerator as claimed in claim 2, said gate comprising a plurality of concentric metal rings, and metal members extending outwardly from adjacent the lower ends of said upright members and interconnecting said concentric rings of said grate. 